This year he is so far 58/84 (69%) with 9 TDs and 2 Ints. He also has 3 rushing TDs. I don't know if he's going to be great but I'd say that's showing a lot when he only started two games this year and they were his first two starts in college football.
Ewers is 3 year starter who up until this year when he has struggled was a likely mid-to-high first round pick. And he still may get drafted in the middle rounds.